Shedding mechanism for looms



Nov. 15, 1938. o. sTAuBLl 2,136,765 I I SHEDDING' MECHANISM FOR LOOMS IFiled Dec. 20, 1937 a Jw/z' Patented Nov. 15, 1938 UNITED STATESSHEDDING MECHANISM FOR LOOMS Othmar Staubli, Horgen, Switzerland,assignor to Gebr. Staubli & Co., Horgeii, Zurich, SWitzer land Aplication December 20, 1937, Serial No. 180,901

10 Claims.

The invention relates to shedding mechanisms for looms, especiallyshedding mechanisms of the so called gem head type as represented for111- st nce in the United states Letters Patent No. 51:13; 1,886,133dated August 23, 1932, Whne however in said mechanism the so-eauedvibrator lever changes its position after each pick reading ac tiUIl Ofthe milk-reading hedls', according to the present invention provision ismade that the posi- 10h tion of said vibrator lever is not altered asthe associated pick-reading needle comes to the same position in twosubsequent pickreading actions In this Way a greater Working speed iSGbtaiifled and the loom becomes better adapted for the 152i weaving ofheavy pieces.

The accom anying drawing represents in a side view a shedding mechanismaccording to m present invention, this view being taken from the in-'side of the machine frame and the various parts ZOtCliS'DOSd between theattern (Said and the hai the notches provided on the periphery of the30::whee1 4.

on a shaft 1 mounted in the machine frame I2,

like the shafts 3 and B, there are loosely mounted directly side by sidebell-crank levers, one for each shafts Each of these lev'ers consists ofa aoglittle plate 8 having fixed theretoan approxn mately horizontalwire 9 disposed above the cylinder 2 and of an upstandin wire l alsofixed on said plate 8. From each wire 9 there hangs loosely apick-reading needle II by means of an 40Ueye vertically above thecylinder shaft 3. Below all wires 9 there extends a rod l3 which issupported by two arms I4 fixed on the shaft 1, this rod 13 serving, in aknown manner, to hold the pick-reading needles ll far on the cylinderdur- 45Hing the movement thereof. By means of a hand lever or the like(not shown) mounted on the shaft 1 the rod I3 may be swung upwardly atany convenient time, for instance, when the cylinder shall be rotatedforwardly or back by hand for to a greater number of picks.

The upstanding arm ll] of the bell-crank lever 8 forms a ring whereinthe bent end of a wire l rests, the rear end of which isslidably guidedin a fixed bar It. Between its two bearings this 55 wire l5 formstwoeyes I1, M3 to guide a pushingpin l9 or respectively; Between thewire it and the eye I! the/wire I5 is surrounded by a light spring 2i.This spring is of such length as not to increase the pressure of thereading needle on the paper card when the reading needle rests 5 upon itl i The pushing pins I9, 20 are pendulously suspended on opposite armsof a rocking lever 22 loosely mounted on ashaft 23. Said pushingpins19', 20 are suspended above two lifting-bars 1U 24 and 25 respectivelywhich have a slightly inwardly inclined abutment 26 or 21 respectively.The lifting-bars 24 and 25 are fixed on two lifting slides 28 mountedoutside the machine frames l2 and provided each with alguiding slot 50along 15 which said lifting slide 28 is guided by means of a roller 5imounted on the shaft 23. The slides 28 and therewith also thelifting-bars 24 and 25 receive an upward and downward movement by meansof two lifting-cams 29 mounted upon a 20,

shaft 30 one on each side of the machine. Above the lifting-cams 29rollers 3| are located which are mounted on the lifting-slide 28 bymeans of a stud 52. The position of the lifting-cams it relatively :tothe cam 5 is such that the lifting- 25' bars 24 and 25 are lifted onlyafter the cam 5 has driven the cylinder 2 for a tooth of the Wheel 4 andthe pick-reading needles II have read the next pick on the cylinderwhich at. this time is at rest. This applies for the forwardigo as wellas for the backward movement of the pick-reading mechanism.

Each rocking lever 22 is mounted below a vibrator-lever 33 and supportson its third arm, which is directed towards said vibrator lever, a 35roller 32 disposed beneath a cam piece 34 attached to the vibrator lever33. The vibrator levers 33 are fulcrumed on a common rod 35.

Each of said vibrator levers 33 supports on a pivot 53 extending fromthe side thereof, a vi- 4 brato'r gear 36 having a crank-pin 3'! adaptedto be turned in one and then in an opposite direc tion by one or theother of the continuously-rotating cylinder gears 38, 39 having teeth onthe half of their circumference as shown and described in the citedPatent No. 1,886,133. Each crank-pin 31 has pivoted to it one end of aconnector 49 the opposite end of which is connected with the harnesscontrolling lever 4| as shown in said prior patent. 50

The drawing shows the parts in that position Which they occupyimmediately after the represented pick-"reading needle II has droppedinto a pick hole of the pattern-card I. That bellcrank lever'il, 9, 10which supports this reading 5 needle II holds, by means of the wire ordrawneedle I5, the pushing-pin I9 in contact with the upwardly extendingweb of the lifting-bar 24 directly above the slightly inwardly inclinedabutment 26. The pushing-pin 20 is in its foremost position andtherewith outside the reach of the rear lifting-bar 25. The rockinglever 22 rests with its forward arm on a supporting rod 43.

Starting from this position the lifting cams 29 begin to lift thelifting slides 28 and therewith also the lifting bars 24 and 25. Thepushing pin I9 hanging above the abutment 26 of the lifting bar 24 ispushed upwardly and therefore rocks the rocking lever 22 on its shaft 23until it comes to rest upon the abutting rod 44. During this movementthe roller 32 comes below the cam piece 34 on the vibrator lever 33 andswings this lever upward so that the gear 36 comes into the reach of theupper tooth roller 38, is rotated and draws with it in known manner theharness controllinglever 4| by means of the connector 40 and thus liftsthe weaving shaft depending from said lever 4|. 7

Shortly after starting of the upward movebent of the lifting bars 24,viz after the push ing pin I9 has been engaged by the lifting bar andcannot slide off from the slightly inwardly inclined abutment 26 thereofthe shaft I receives an angular movement from a cam disc 41 fixed on theshaft by means of a lever 48 fixed on the shaft I. Therefore also therod l3, which is connected with the shaft. I by means of the levers I4,makes an upward movement and lifts all pick-reading needles II off fromthe patterncard cylinder 2. Thus the bell crank levers 8, 9, I0 swingupwardly but without altering the position of the draw-needles I5 andthe pushing-v pins l9 and 20 because the inclined abutment 26against-the little pressure exerted by the compressed springs 21 retainsthose pushing pins I9 which belong to pickreading'needles dropped intotooth. Now the rod I3 is lowered again as the cam 41 leaves the roller55 of the lever 48 and the pick-reading needles read off the next pickon the pattern-card. The lifting bars 24, 25 are lowered again and suchpushing-pins I9 which had previously been engaged become now free fromthe abutment 26.

If now a pick-reading needle II which at the previous'pick-reading haddropped into a hole of the pattern-card does not find a hole in thelatter, the associated spring 2| displaces its pushing-pins I9, 20backwardly so that the pin I9 with its lower end is swung out of thepath of the abutment 26 and the pin 20 touches the upstanding web of thelifting-bar 25. The rear arm of the rocking lever 22 rests on theabutting bar 44. As now the lifting-bars move upwardly again thepushing-pin 29 islifted by the bar 25 and the rocking lever 22 is thusswung backwardly to its initial position shown in the drawing, thus theroller 32 moves. forwardly below the cam piece 34 on the vibrator lever33 whereby this latter is lowered, the gear 36 comes into the reach ofthe toothed roller 39, is turned backwardly by this roller and, by meansof the connector 40 lowers the harness-controlling lever 4|.

If at the next pick-readingthe reading-needle I I does again not find ahole in the pattern-card, the position of the bell-crank-lever 8, 9, I0and therefore also the position of the pushing-pins I9, 20 rests thesame, this is: I9 is turned rearward, 20 depends vertically over theabutment 2'! of the lifting-bar 25 but, because the rocking lever takesnow the position shown, in such an elevation that at the next liftingmovement of the lifting bar it is not reached by this bar. Thevibrator-lever rests thus unaffected.

If however a pick-reading needle II which has dropped into a hole of thepattern-card at the first pick considered herebefore finds again a holein the pattern-card I, the wire or drawneedle I5 moves forwardly againand causes the pushing-pin I9 to touch again the upstanding web of thelifting bar 24. The lifting pin 20 is also drawn forwardly and therebycomes out of reach of the lifting-bar 25. As however the front arm ofthe rocking lever 22 is still in its raised position as in the precedingpick-reading, the lifting bar 24 in itsupmost position can only touchthe pushing-pin I9 but not lift it further. Thus the upward movement ofthe liftingbars 24 and 25 does not effect an alteration in the positionof the rocking lever 22. Therefore the vibrator-lever 33 also rests inits upper position. This position remains stationary as long as thepick-reading needle II finds a pick-hole in the pattern-card I. When itdoes not find any hole, the rear pushing pin 20 turns the rocking lever22 back to the initial position shown in the drawing whereby thevibrator-lever 33 is lowered, the gearing 36 is rotated backwardly inconsequence of its interlocking with the toothed roller 39, theharness-controlling lever 4| is swung backwardly and thereby the harnessshaft is lowered.

It is possible to rotate the pattern-card cylinder 2 forward or rearwardby displacing on the shaft 30, by means of a knob (not shown), a keywhich connects the cam 5 either with a chainwheel which is driven fromthe shaft 30 (the same direction of rotation as the shaft 30) or with aspur-wheel driven from the shaft 39 in reversed direction in a mannersimilar to that described in the prior specification.

The mechanism described can be used also, with certain modifications, inthat case where the lifting of the harness-shafts shall be affected ifthe pick-reading needles do not fall into a hole when picking but meetsolid parts of the patterncard. For this caselthe abutments 26, 21 ofthe lifting-bars 24, 25 are disposed on the outer side.

' What I claim is:

1. In a shedding-mechanism for looms, the combination of a pattern-card,with pick-reading needles hanging above said pattern-card and adapted tobe lowered on to this pattern-card to read the picks therefrom, levers,on which said pick-reading needles are suspended, a harnesscontrollingmechanism comprising a vibrator lever the position of which depends onthe position of the associated pick-reading needle relatively to thepattern-card, movable members inserted between each of the firstmentioned levers and a vibrator lever for actuating this lever, saidmembers being constructed and arranged in such a manner that saidvibrator lever retains its position unaltered during a plurality ofpick-reading actions giving the same position of the associatedpick-reading needle relatively to the pattern combination of apattern-card with a series of levers loosely mounted on a common shaft,a pick-reading needle on each of these levers hanging above saidpattern-card, a rocking lever for each of said pick-reading needles, twopushingpins pendulously suspended on opposite directed arms of thisrocking-lever, a lifting-bar below each of the two series ofpushing-pins adapted to receive a reciprocating up and down movement,means adapted to alternately bring one or the other series of saidpushing-pins over the associated lifting-bar according tothe position ofthe associated pick-reading needle relatively to the pattern-card, avibrator-lever in reach of each of said rocking-levers, a vibrator-gearpivoted on said vibrator-lever, a harness-controlling lever movablyconnected with said gear and two cylinder-gears continuously rotating inopposite directions with which said vibrator-gearis alternately broughtin engagement according to the position of the associated pick-readingneedle and the corresponding position of the vibrator-lever.

3. In a shedding-mechanism, a pattern-card, a series of levers looselymounted on a common rod above said pattern-card, a pick-reading needleon each of these levers, a vibrator-lever for each .pick-reading needle,a harness-controlling device adapted to be operated by saidvibrator-lever, a rocking-lever beneath each of said vibrator-leversand. supporting it in such a manner that according to the position ofthe rocking-lever the associated harness-shaft is in its upper or in itslower position, a connection of said rocking-lever with members foroperating it on one side and with the pick-reading needle supportinglever on the other side in such a manner that said operating membersonly come to act upon the rockinglever in consequence of a change of theposition 3 of the pick-reading needle relatively to the pattern-card atits pick-reading action.

4. In a shedding mechanism for looms, the combination of an endlesspattern-card consisting of Verdol-paper or other thin light materialwith a series of levers loosely mounted on a common-shaft, pick-readingneedles hanging on said levers above the pattern-card, a rocking-leverin connection with each of said levers, a pushing-pin pendulouslysuspended on each of two opposite directed arms of each rocking-lever,wire like members loosely connecting the two pushing-pins of the samerocking-lever with the lever supporting the associated pick-readingneedle, a lifting bar underneath the pushing-pins adapted to perform areciprocating up and down movement, a vibrator-lever the position ofwhich is determined by said rocking-lever, a harness controlling leverloosely connected with said vibratorlever, the connection between saidwire like members with the first mentioned lever on one side and the twoassociated pushing-pins on the other side being such that in the momentwhere the associated pick-reading needle is reading a pick from thepattern-card, the position of the two pushing-pins is determined by thewire like memher.

5. In a shedding-mechanism for looms the combination of a pattern-cardwith a series of bell-crank levers a pick reading needle hanging on onearm of each of said bell-crank levers and adapted to be lowered ontosaid pattern-card to read a pick there, a rod extending underneath allsaid needles and adapted to lift them from the pattern-card atpredetermined intervals, a rocking-lever for each pick-reading needle, apushing-pin pendulously suspended on each of two oppositely directedarms of said rocking-lever, a lifting-bar extending below each of thetwo series of pushing-pins and adapted to perform a reciprocating up anddown movement at each pick-reading action of the pick-reading needles, adraw-needle connecting the two pushing-pins of each rockinglever withthe second arm of one of said bell-crank levers so as to bring theposition of said pushing-pins relatively to the lifting-bars in relationwith the position of the associated pick-reading needle relatively tothe patterncard, a vibrator-lever controlled by said rockinglever and aharness-controlling-lever connected with this vibrator-lever.

6. In a shedding-mechanism for looms the combination of a pattern-cardwith a series of balanced levers, a pick-reading needle hanging on eachof these balanced levers above said pattern card and adapted toperiodically be lowered to the pattern-card and lifted therefrom, arocking-lever for each pick-reading needle, a pushing-pin pendulouslysuspended on oppositely directed arms of this rocking-lever, alifting-bar beloweach series of said pushing-pins, each of these liftingbars forming an abutment on opposite sides relatively one to another,this abutment having a lying and an upstanding web, a cam supportingsaid lifting bars to lift them together at each pickereading action ofvsaid needles, a wire like member connecting the pushing-pins of eachrocking-lever one with another and with one of said balanced-levers insuch a manner that according to the position of the associatedpickreading needle relatively to the pattern-card one or the other ofsaid pushing-pins is hanging over the lying web of the abutment of theassociated lifting bar and touches the upstanding web thereof whilst theother pushing-pin is retained by said wire like member out of the pathof the ascending lifting-bar, a vibrator-gear adapted to be brought intoand out of action according to whether one or the other of said liftingbars and pushing-pins acts upon the rocking lever.

7. In a shedding mechanism for looms, the combination of a pattern-cardwith a series of bell-crank levers, a pick-reading needle hanging on anapproximately horizontal arm of each of these bell-crank levers, aseries of rocking levers, a pushing-pin pendulously hanging on each oftwo oppositely directed arms of each of said rocking-levers, alifting-bar underneath each series of pushing pins, a wire like memberconnecting the two pushing pins of each of said rockinglevers with theupstanding arm of one of said bellcrank levers in such a manner thataccording to the position of the pick-reading needle hanging on theother arm of the bell-crank lever relatively to the pattern-card one orthe other of said pushing pins is held in the path of the associatedlifting-barand the other out of said path in order to determine thedirection of the next movement of the rocking lever, and aharnesscontrolling device controlled by said rocking!- lever.

8. In a shedding mechanism for looms, the combination of a pattern-cardwith a series of bell-crank levers, a pick-reading needle hanging oneach of these levers above the pattern-card, a series of two-armedrocking-levers, a pushing-pin pendulously hanging on each of the twoarms, a lifting bar below each of the two series of pushing-pins, eachof these lifting-bars forming an abutment having an upstanding and alying web, this latter being slightly inclined towards the upstandingweb, a draw-needle slidably supported in the upstanding arm of one ofsaid bell-crank ,levers and connecting this arm with the twopushing-pins of one of said rocking-levers in such a manner as toalternately hold one of these pins over the lying web of the associatedlifting-bar in contact with the upstanding web whilst the otherpushing-pin is held out of the path of its lifting-bar, a light springsurrounding said drawneedle and inserted between the bell-crank leverand the next of said pushing-pins and adapted to temporarily change theposition of the two pushing-pins relatively to their lifting-bars whennot engaged thereby, a'vibrator-lever supported by each of said rockinglevers so as to be altered in its position when this rocking-lever isoperated by one or the other of said lifting bars, and aharness-controlling device connected with each of said vibrator-levers.

9. In a :shedding mechanism for looms, the combination of a pattern-cardof Verdol paper or other thin light material, with a series of bellcranklevers, a pick-reading needle hanging on an approximately horizontal armof each of these ;bell-crank levers above said pattern-card, a series ofrocking-levers having each two oppositely directed arms and anupwarddirected intermediate arm, a vibrator lever resting upon thisintermediate arm, a harness-controlling device connected ,2 with thisvibrator lever in such amanner'that the position of the harness isdetermined by the position given to "said vibrator lever by theassociated rocking lever, a pushing-pin hanging on each of the oppositedirected-arms of said rock- ;ing-lever, a lifting-bar below each seriesof pushsponding lifting bar according to the position of the associatedpick-reading needle relatively to the pattern-card, a light spiralspring surrounding said draw-needle between the bell-crank lever and thefirst pushing-pin for transmitting the movement of the bell-crank leverto said pushingpins when the associated pick-reading needle is liftedoff from the pattern-card, the connection between said draw-needle andthe lever arm supporting it being such as to allow a relative movementbetween the bell-crank lever and the drawneedle.

10. In a shedding mechanism for looms, the combination of apattern-card, with a series of bell-crank levers, loosely mounted on acommon shaft, a pick-reading needle hanging on one arm of each of thesebell-crank levers above said pattern-card, a series of rocking-levers, aharness controlling device controlled by each of said rocking-levers, apushing-pin pendulously hanging on each of two oppositely directed armsof said rocking-levers, a lifting-bar underneath each series of theselevers adapted to perform a reciprocating up and down movement, adraw-needle connecting an upstanding arm of each of said bell-cranklevers with the two pushing-pins of the associated rocking levers insuch a manner that alternately one or the other of said pushing pins isheld in the path of the associated lifting-bar at its upward movementwhilst the other pushing-pin is turned ofi from the path of itslifting-bar, the connection between said draw-needle and the upstandingarm of the bell-crank lever being such as to allow a movement of onerelatively to the other, a light spring surrounding the draw-needlebetween the bell-crank lever and the next of said pushing-pins andadapted to temporarily displace the draw-needle relatively to thebell-crank lever and to swing the pushing-pins to alter their positionrelatively to the associated lifting-bar.

OTHMAR sTAUBLI.

